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// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include "common/logging/filter.h"
#include "common/logging/backend.h"
#include "common/string_util.h"
namespace Log {
Filter::Filter(Level default_level) {
ResetAll(default_level);
}
void Filter::ResetAll(Level level) {
class_levels.fill(level);
}
void Filter::SetClassLevel(Class log_class, Level level) {
class_levels[static_cast<size_t>(log_class)] = level;
}
void Filter::SetSubclassesLevel(const ClassInfo& log_class, Level level) {
const size_t log_class_i = static_cast<size_t>(log_class.log_class);
const size_t begin = log_class_i + 1;
const size_t end = begin + log_class.num_children;
for (size_t i = begin; begin < end; ++i) {
class_levels[i] = level;
}
}
void Filter::ParseFilterString(const std::string& filter_str) {
auto clause_begin = filter_str.cbegin();
while (clause_begin != filter_str.cend()) {
auto clause_end = std::find(clause_begin, filter_str.cend(), ' ');
// If clause isn't empty
if (clause_end != clause_begin) {
ParseFilterRule(clause_begin, clause_end);
}
if (clause_end != filter_str.cend()) {
// Skip over the whitespace
++clause_end;
}
clause_begin = clause_end;
}
}
template <typename It>
static Level GetLevelByName(const It begin, const It end) {
for (u8 i = 0; i < static_cast<u8>(Level::Count); ++i) {
const char* level_name = Logger::GetLevelName(static_cast<Level>(i));
if (Common::ComparePartialString(begin, end, level_name)) {
return static_cast<Level>(i);
}
}
return Level::Count;
}
template <typename It>
static Class GetClassByName(const It begin, const It end) {
for (ClassType i = 0; i < static_cast<ClassType>(Class::Count); ++i) {
const char* level_name = Logger::GetLogClassName(static_cast<Class>(i));
if (Common::ComparePartialString(begin, end, level_name)) {
return static_cast<Class>(i);
}
}
return Class::Count;
}
template <typename InputIt, typename T>
static InputIt find_last(InputIt begin, const InputIt end, const T& value) {
auto match = end;
while (begin != end) {
auto new_match = std::find(begin, end, value);
if (new_match != end) {
match = new_match;
++new_match;
}
begin = new_match;
}
return match;
}
bool Filter::ParseFilterRule(const std::string::const_iterator begin,
const std::string::const_iterator end) {
auto level_separator = std::find(begin, end, ':');
if (level_separator == end) {
LOG_ERROR(Log, "Invalid log filter. Must specify a log level after `:`: %s",
std::string(begin, end).c_str());
return false;
}
const Level level = GetLevelByName(level_separator + 1, end);
if (level == Level::Count) {
LOG_ERROR(Log, "Unknown log level in filter: %s", std::string(begin, end).c_str());
return false;
}
if (Common::ComparePartialString(begin, level_separator, "*")) {
ResetAll(level);
return true;
}
auto class_name_end = find_last(begin, level_separator, '.');
if (class_name_end != level_separator &&
!Common::ComparePartialString(class_name_end + 1, level_separator, "*")) {
class_name_end = level_separator;
}
const Class log_class = GetClassByName(begin, class_name_end);
if (log_class == Class::Count) {
LOG_ERROR(Log, "Unknown log class in filter: %s", std::string(begin, end).c_str());
return false;
}
if (class_name_end == level_separator) {
SetClassLevel(log_class, level);
}
SetSubclassesLevel(log_class, level);
return true;
}
bool Filter::CheckMessage(Class log_class, Level level) const {
return static_cast<u8>(level) >= static_cast<u8>(class_levels[static_cast<size_t>(log_class)]);
}
}
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